Why Americans love prepaid cards

The majority of prepaid card users, 59%, also have checking accounts, the Pew study found.

The prepaid card business is booming for one big reason: People want to gain more control over their spending.

The cards aren't attached to bank accounts, and you can load and withdraw as much money as you want onto them from ATMs and make payments anywhere that debit or credit cards are accepted. And since you can only spend the amount that you've placed on the card, there's no risk of overdrawing your account and getting hit with overdraft fees.

While often viewed as an alternative banking product for the millions of Americans who lack bank accounts, the unbanked are no longer the primary users of prepaid cards, according to a Pew Charitable Trusts survey that polled 613 prepaid card users. In fact, the majority, 59%, also have checking accounts.

Most prepaid card users reported struggling with credit card debt, overspending and overdraft fees in the past -- with two in five customers closing their own checking account or having an account closed after incurring too many overdrafts. And the most common reasons respondents cited for using prepaid cards were to avoid spending more money than they have and to avoid credit card debt.

"I am already negative in my checking account. So with this, I know what I can put on and what I can and cannot use," said one respondent in Pew's survey.

Hacking your credit card as you shop

Unbanked prepaid card users said they want to be able to purchase items online. "I'm avoiding banks, and I still have Netflix, so I need to pay for it with some sort of plastic because you can't pay for things online with cash," another user stated.

Many people who previously dealt in all cash said they switched to prepaid cards because it's safer than walking around with wads of money in their pocket, and others reported liking prepaid cards because they allow you to make transactions more anonymously -- since they aren't tied to a bank account. Another group of consumers said they simply can't qualify for checking accounts.

The average prepaid card user has an annual income of $30,000, and 42% have no emergency savings, Pew found. They're more likely to be single, African-American and under the age of 50. They're also more likely to rent versus own their home.

Is a prepaid carda good idea?

Fees used to be a big problem with prepaid cards, and still are in many cases. But as demand grows, more affordable options are entering the market -- and some are even less fee-heavy than traditional checking accounts.

Overall, prepaid cards are shifting their fee models to look more like checking accounts -- getting rid of some of the ancillary fees like customer service fees and charging more consistent monthly fees. This is a positive development, says Pew, since customers are less likely to be hit with charges they aren't expecting.

"While prepaid cards offer many benefits to consumers, they are a relatively new product with little oversight. A lack of protections undermines prepaid cards as a safe and easy way to manage money," said Susan Weinstock, director of Pew's safe checking research, in a statement.